package com.zhouhong;

/**
 * @ClassName: stack
 * @Description:
 * @Author: zhouhong
 * @Create: 2021-04-01 11:30
 **/

public class LinkedListStack<E> implements StackInterface<E> {

    private LinkedList<E> list;
    LinkedListStack(){
        list = new LinkedList<>();
    }
    @Override
    public int getSize() {
        return list.getSize();
    }
    @Override
    public boolean isEmpty() {
        return list.isEmpty();
    }
    @Override
    public void push(E e) {
        list.addFirst(e);
    }
    @Override
    public E pop() {
        return list.removeFirst();
    }
    @Override
    public E peek() {
        return list.getFirst();
    }
    @Override
    public String toString(){
        StringBuilder res = new StringBuilder();
        res.append("Stack: top");
        res.append(list);
        return res.toString();
    }


}
